Improvement in paint-brushes



UNITED STATES PATENT OFFICE.

JOHN L. WHITIN G, OF BOSTON, MASSACHUSETTS.

IMPROVEM ENT IN PAINT-'BRUSH ES.

Specification forming part of Letters Patent No. 108,420, dated October1S, 1870.

To all whom it may concern,.-

Be it known that I, JOHN LAKE WRITING, of Boston, of the county ofSuffolk and State of Massachusetts, have invented a new and usefulImprovement in the Manufacture of Paint-Brushes; and Ido hereby declarethe same to be fully described in the following specification, andrepresented in the accompanying drawings, of which- Figure l denotes alongitudinal section of a brush made in accordance With my invention.

` Fig. 2 is a top view of the strengthener, to be hereinafter described.

In making a brush, I employ a metallic ferrule, capped at one or theupper end and open at the other orlower end, the cap having a hole madethrough it at its cent-er to receive the handle. The ferrule may becylindrical in form, or it may be barrel-shaped, or it may be slightlyconical or tapering. With such a ferrule I employ a strengthener, whichconsists of a short cylinder or block of wood having a diametercorresponding with that of the interior or chamber of the ferrule, orthat part of it which is next to the cap or head of the ferrule, thesaid strengthener having a hole through it centrally, and such holehaving a diameter about equal to that of thehole in the cap of theferrule.

In Fig. l of the drawings, A denotes the 1netallic ferrule provided witha head, a, at its upper end, and such head having a hole, b, madethrough it centrally.

The strengthener is exhibited at B as placed within and iitted to theferrule and against the head a. If desirable, the strengthener may be intwo or more sections, for the purpose of being readily introduced intothe ferrule7 as in some cases, pariicularly when the ferrule is conicalor tapering, it may be nec essary to so make the introducer in order toget it into its place in the ferrule.

The ferrule, having been so made and provided with a strengthener, asdescribed, is next to have the mass of stock or bristles C inserted init at its open or lower end, and up to and against the strengthener,after Which the handle, which is to be conical or tapering, is to beinserted, smaller end foremost, int-o the mass of bristles, and into theholes of the strengthener B and the head a, and be driven upward closelyinto such holes and into the said mass, so as to expand it in theferrule and aid in holding it4 therein.

The ferrule I form with two or any other suitable number ofconcavo-convex beads, c c, extending around it, so as to constitutegrooves or channels on and about its interior surface. One of suchgrooves I usually arrange so as to extend around the periphery of thestrength ener, in order that such st-rengthener may be expanded by thehandle into the groove, the latter thus being made to serve the purposeof aiding in holding the strengthener in place in the ferrule. The othergroove or grooves, c, I arrange, as shown, so as to receive more or lessof the bristles when the mass is expanded by the handle, the groove orgrooves thus serving to aid in holding the bristles in connection withthe ferrule.

In fixing the bristles in the ferrule and to the handle and thestrengthener, as well as to aid in fixing the latter in or to theferrule, cement may be employed,it being applied to the parts prior tothe insertion of the handle therein.

From the above it will be seen that the purpose of the strengthener istwofold-viz., to give support to the handle and to save the 11ecessityof extending thebristles up to the cap or head of the ferrule. It isadvantageous in other respects, as it not only strengthens the ferruleor prevents it from being indented, but when of wood enables the cementon the bristle-heads to hold to it with g'reat tenacity.

A rivet or pin may be inserted transversely through the handle, theferrule, and the strengthener, in case such may be desirable, in orderto strengthen the connection of the said parts.

I claim as my inventionl. The arrangement and combination of thestrengthener B, the capped ferrule A, the tapering handle D, and themass of bristles or stock C, all as described.

2. The ferrule as formed, with one or more grooves arranged within theperiphery of its chamber."substantially in manner as set forth, incombination with the strengthener and taf pering handle, or equivalentmeans of expanding the bristles, the whole being as speciiied.

JOHN L. VHITING.

Witnesses:

S. N. PIPER, J. R. SNOW.

